Stroller with means for limiting direction of a wheel
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B62B-007/06
B62B-007/00
B62B-001/00
출원번호
US-0794456
(2004-03-05)
발명자
/ 주소
Lan,Red
출원인 / 주소
Lan,Red
대리인 / 주소
Darby &
인용정보
피인용 횟수 :
22인용 특허 :
3
초록▼
A stroller has a direction-limiting device including a direction-limiting element movable relative to a stroller frame between a limiting position, where the direction-limiting element is inserted into a limiting hole in a wheel-supporting member of a wheel unit so as to prevent rotation of the whee
A stroller has a direction-limiting device including a direction-limiting element movable relative to a stroller frame between a limiting position, where the direction-limiting element is inserted into a limiting hole in a wheel-supporting member of a wheel unit so as to prevent rotation of the wheel-supporting member relative to the stroller frame, and a release position, where the direction-limiting element is removed from the limiting hole so as to permit the rotation of the wheel-supporting member relative to the stroller frame. A control device includes an adjusting member disposed on an upper portion of a handle unit of the stroller frame, and a pull cord disposed between the adjusting member and the direction-limiting element. The adjusting member is operable to move the direction-limiting element between the limiting position and the release position.
대표청구항▼
I claim: 1. A stroller comprising: a stroller frame including a handle unit and a mounting seat disposed below and connected fixedly to said handle unit; a wheel unit disposed under said mounting seat and including a wheel-supporting member that is connected pivotally to said mounting seat and that
I claim: 1. A stroller comprising: a stroller frame including a handle unit and a mounting seat disposed below and connected fixedly to said handle unit; a wheel unit disposed under said mounting seat and including a wheel-supporting member that is connected pivotally to said mounting seat and that has a limiting hole, and a wheel that is connected rotatably to said wheel-supporting member; a direction-limiting device including a direction-limiting element movable relative to said mounting seat between a limiting position, where said direction-limiting element is inserted into said limiting hole in said wheel-supporting member of said wheel unit so as to prevent rotation of said wheel-supporting member of said wheel unit relative to said stroller frame, and a release position, where said direction-limiting element is removed from said limiting hole in said wheel-supporting member of said wheel unit so as to permit the rotation of said wheel-supporting member of said wheel unit relative to said stroller frame; and a control device including an adjusting member disposed on an upper portion of said handle unit of said stroller frame, and a pull cord disposed between said adjusting member and said direction-limiting element, said adjusting member being operable to move said direction-limiting element between said limiting position and said release position. 2. The stroller as claimed in claim 1, wherein said mounting seat is formed with an integral mounting plate that has a hole which is formed therethrough and which is located above said limiting hole in said wheel-supporting member of said wheel unit, said direction-limiting element extending through said hole in said mounting plate of said mounting seat. 3. The stroller as claimed in claim 1, wherein said direction-limiting device further includes a biasing member for biasing said direction-limiting element to move downwardly to said limiting position, and a controlling element rotatable relative to said mounting seat to move said direction-limiting element between said limiting position and said release position. 4. The stroller as claimed in claim 3, wherein said direction-limiting device further includes a base fixed on said mounting plate of said mounting seat and having a top surface that is formed with an integral projection and two spaced-apart integral upright walls, said biasing member being mounted rotatably on said projection and being formed with two resilient pressing arms that have free ends which are connected rotatably to an upper end of said direction-limiting element, said controlling element being journalled on said upright walls between said projection and said direction-limiting element and being configured as a rod that has a circular cross-section and a recess to define a thinner rod portion, said pressing arms of said biasing member pressing said thinner rod portion of said controlling element against said top surface of said base, said control device being operable to rotate said controlling element relative to said base so as to move said free ends of said pressing arms of said biasing member toward and away from said top surface of said base of said direction-limiting device, thereby moving said direction-limiting element between said limiting position and said release position. 5. The stroller as claimed in claim 4, wherein said handle unit includes a pair of aligned left and right wheel rods, said mounting seat being disposed below and connected fixedly to said left and right wheel rods, said adjusting member being disposed movably on one of said left and right wheel rods and being movable along a longitudinal direction of said one of said left and right wheel rods, said pull cord having an upper end that is fastened to said adjusting member, and a lower end that is fastened to said controlling element so as to rotate said controlling element when said adjusting member moves along said one of said left and right wheel rods. 6. The stroller as claimed in claim 5, wherein said one of said left and right wheel rods is formed with a positioning slot that has a circular upper slot portion and a uniform-diameter lower slot portion which has an upper end coupled with a lower end of said circular upper slot portion, and a width smaller than a diameter of said circular upper slot portion, said control device further including a spring-loaded anchor rod that is received slidably within said positioning slot in said one of said left and right wheel rods and that includes a small-diameter rod portion, and a large-diameter rod portion having a diameter which is slightly smaller than that of said circular upper slot portion of said positioning slot in said one of said left and right wheel rods and which is larger than that of said small-diameter rod portion and the width of said uniform-diameter lower slot portion of said positioning slot in said one of said left and right wheel rods, said adjusting member being movable relative to said one of said left and right wheel rods between a lower limit position, where said direction-limiting element is disposed at said limiting position and where said small-diameter rod portion of said anchor rod is disposed at a lower end of said uniform-diameter lower slot portion of said positioning slot in said one of said left and right wheel rods, and an upper limit position, where said direction-limiting element is disposed at said release position and where said large-diameter rod portion of said anchor rod engages fittingly said circular upper slot portion of said positioning slot in said one of said left and right wheel rods. 7. The stroller as claimed in claim 6, wherein said small-diameter rod portion of said anchor rod has an externally threaded inner end and an outer end that is formed with an outward flange which extends radially and outwardly therefrom and which is disposed outwardly of said adjusting member, said large-diameter rod portion of said anchor rod having an internally threaded inner end that engages said externally threaded inner end of said small-diameter rod portion of said anchor rod, and an outer end that is formed with an outward flange which extends radially and outwardly therefrom and which is disposed outwardly of said adjusting member. 8. The stroller as claimed in claim 7, wherein said one of said left and right wheel rods is tubular, has an upper portion, and is formed with opposite inner and outer walls that are parallel to each other, each of said inner and outer walls having an outer surface, said positioning slot being formed through said inner wall, said outer wall being formed with a slide slot therethrough, said adjusting member being sleeved movably around said upper portion of said one of said left and right wheel rods and having inner and outer plate portions that abut respectively against said outer surfaces of said inner and outer walls, said inner plate portion being formed with a circular hole therethrough, said outer plate portion being formed with a hollow cylindrical protrusion that defines a counterbore and that has an annular end wall, said hollow cylindrical protrusion being received slidably within said slide slot in said outer wall of said one of said left and right wheel rods, said counterbore having a small-diameter bore portion proximate to said inner plate portion, and a large-diameter bore portion distal from said inner plate portion and having a diameter larger than that of said small-diameter bore portion, said small-diameter rod portion of said anchor rod extending through said counterbore in said outer plate portion, each of said inner and outer plate portions having an outer surface, said control device further including a coiled compression spring that is sleeved around said small-diameter rod portion of said anchor rod between said end wall of said hollow cylindrical protrusion and said outward flange of said small-diameter rod portion of said anchor rod so as to bias said outward flange of said large-diameter rod portion of said anchor rod to press against said outer surface of said inner plate portion of said adjusting member, thereby engaging said large-diameter rod portion of said anchor rod with said circular upper slot portion of said positioning slot in said inner wall of said one of said left and right wheel rods when said adjusting member is disposed at said upper limit position, said outward flange of said small-diameter rod portion of said anchor rod being movable forcibly toward said outer surface of said outer plate portion of said adjusting member against biasing action of said coiled compression spring so as to remove said large-diameter rod portion of said anchor rod from said circular upper slot portion of said positioning hole in said inner wall, thereby permitting said small-diameter rod portion of said anchor rod to move from said circular upper hole portion of said positioning hole into said uniform-diameter lower hole portion of said positioning hole. 9. The stroller as claimed in claim 2, wherein said wheel-supporting member of said wheel unit is rotatable relative to said mounting seat about a rotating axis, said wheel-supporting member of said wheel unit further having two guide slots that are located on two opposite sides of said limiting hole in said wheel-supporting member of said wheel unit, that are communicated with said limiting hole in said wheel-supporting member of said wheel unit, and that extend along a circumferential direction of said rotating axis so as to guide said direction-limiting element to move into said limiting hole in said wheel-supporting member of said wheel unit when said wheel-supporting member of said wheel unit rotates relative to said mounting seat. 10. The stroller as claimed in claim 1, wherein said adjusting member is configured as a swing lever, and has a pivot end connected pivotally to said handle unit, and a free end, said pull cord having an upper end that is connected pivotally to said adjusting member at a location between said pivot end and said free end of said adjusting member, and a lower end that is fastened to said controlling element so as to rotate said controlling element when said adjusting member rotates on said handle unit between first and second positions. 11. The stroller as claimed in claim 10, wherein said control device further includes a pair of first and second stop rods that are connected fixedly to said handle unit, said adjusting member being swingable between said first and second stop rods, said adjusting member abutting against said first stop rod when said direction-limiting element is disposed at said limiting position, said adjusting member abutting against said second stop rod when said direction-limiting element is disposed at said release position.
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이 특허에 인용된 특허 (3)
Frankel Gail (5710 Glen Heather Dr. Dallas TX 75252), Handle support assembly.
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